X-ray Absorption Spectroscopy Study of Novel Inorganic鈥搊rganic Hybrid Ferromagnetic Cu鈥損yz鈥揫M(CN)8]3鈥?/sup> Assemblies

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• 作者：Olaf Stefa艅czyk ; Robert Podgajny ; Tomasz Korzeniak ; Micha艂 Rams ; Marcin Kozie艂 ; Wies艂aw 艁asocha ; Dariusz A. Zaj膮c ; Barbara Sieklucka
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：November 5, 2012
• 年：2012
• 卷：51
• 期：21
• 页码：11722-11729
• 全文大小：550K
• 年卷期：v.51,no.21(November 5, 2012)
• ISSN：1520-510X

文摘

We present a unique interpretation of X-ray absorption spectroscopy (XAS) spectra at Cu:K, W:L₃, and Mo:K edges of structurally related magnetic Cu^II鈥揫M^V(CN)₈]^{3鈥?/sup> compounds. The approach results in description of the structure of novel three-dimensional (3-D) CuII₃(pyz)[MV(CN)₈]₂路xH₂O, M = W (1), Mo, (2) polymers. Assemblies 1 and 2 represent hybrid inorganic鈥搊rganic compounds built of {CuII[WV(CN)₈]鈭?/sup>}_n double-layers linked by cyanido-bridged {CuII鈥?渭-pyz)2+}_n chains. These CuII鈥揗V systems reveal long-range magnetic ordering with T_c of 43 and 37 K for 1 and 2, respectively. The presence of the 3-D coordination networks and 8 cyanido-bridges at MV centers leads to the highest Curie temperatures and widest hysteresis loops among CuII鈥揫MV(CN)₈]3鈥?/sup> systems.}